268 



C. A. SUSSMILCH AND T. W. E. DAVID. 



felspar. It is the last of the Kuttung lava flows and is 

 probably the most acidic. 



The Seaham Glacial Beds. — This is the most interesting 

 subdivision of the Kuttung Series. These glacial beds, or 

 such parts of them as had previously been observed, have 

 always been considered to belong to the Permo-Oarboni- 

 ferous system. The following are detailed sections of these 

 beds as they occur at Seaham in the Williams River valley 

 and at Paterson in the Paterson River valley; they are 

 also shown in diagrammatic section in Plate XXII. 



Section at Seaham. Feet. Section at Paterson. Feet. 



Grey tuffaceous mudstones 264 Grey tuffaceous mudstones 200 



Tillite Bed (No. 5 Bed) ... 



75 



Tillite 230 



Varve Shales 



100 



Varve Shales ... ..120 



Tillite Bed (No. 4 Bed) ... 



80 



White Tuffs 100 



White Tuffs 



55 



Varve Shales 100 



Tillite Bed (No. 3) 



200 



White Tuffs 35 



White Tuffs 



315 



Fluvio-glacial conglomerate 150 



Varve Shales (with contor- 







tions) 



110 



Total ... 935 



Fluvio-glacial conglomerate 







(No. 2 Bed) 



50 





Tuffs (with conglomerates) 



220 





Fluvio-glacial conglomerate 







(No. 1 Bed) 



270 





Total 



...1739 



It will be seen that these beds have their best develop- 

 ment at Seaham, and this section will be taken for detailed 

 description. 



The Fluvio-glacial Conglomerates and Tillites. — The first 

 bed rests directly upon the Paterson rhyolite not only at 

 Seaham but wherever these glacial beds have been found 

 to occur. At and near its base this glacial conglomerate 



